our cars are particular about tranny fluid & I recommended what I have used, which is Pentosin. I've read a number on Internet postings noting hard shifting when using other brands. Since you're experiencing what you describe as "balking" shifting, perhaps when previously refilled, it was w/another brand? If so, a switch to Pentosin may fix you up.
BTW, I can't imagine how using another brand would hurt the tranny, just maybe stiffen up the shifting a bit.
JB/SE SoDak
1997 986 - Wolfi
Yankton, SD
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